Effect of Retrogression Time on the Mechanical Properties and Stress Corrosion Cracking Behavior of 7A60 Aluminum Alloy

Abstract:

7A60 aluminum alloy was treated under different retrogression time, and the micro-structure, mechanical properties and stress corrosion behaviors were observed and determined by optical microscopy, transmission electron microscopy and slow strain rate tester. The results shown that with the increasing of retrogression time the precipitates within the grains were gradually grown up, and the precipitates along the grain boundaries were changed from small and closely spaced into coarse and widely spaced ones. The elongation and toughness ratio of 7A60 alloy increased obviously with the retrogression time, whereas the tensile strength and hardness of 7A60 alloy decreased. The optimum retrogression time is about 60min, under which 7A60 alloy has a best combination of tensile strength, ductility and stress corrosion resistance.

• Periodical: Advanced Materials Research (Volumes 562-564)
• Pages: 227-233
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.562-564.227
• Online since: August 2012
• Authors: Xue Hui Wang, Ji Hui Wang, Jie Song, Cong Wei Fu
• Keywords: Mechanical Property, Microstructure, Retrogression Time, Stress Corrosion Cracking (SCC)

References

[1] J. Onoro: Materials and Corrosion, Vol. 61(2010), p.125.

[2] R. G. Song, W. Dietzel, B. J. Zhang, W. J. Liu, M. K. Tseng, A. Atrens: Acta Materialia, Vol. 52(2004), p.4727.

[3] B. M. Cina: U. S. Patent 3856584. (1974).

[4] J. C. Lin, H. L. Liao, W. D. Jehng, C. H. Chang, S. L. Lee: Corrosion Science, Vol. 48(2006), p.3139.

[5] M. Baydogan, H. Cimenoglu, E. S. Kayali, J. Rasty: Metallurgical and Materials Transactions A, Vol. 39A(2008), p.2470.

[6] Y. Reda, R. Abdel-Karim, I. Elmahallawi: Materials Science and Engineering A, Vol. 485(2008), p.468.

[7] E. Habiby, A. Ulhaq, F. H. Hashmi, A. Q. Khan: Metallurgical Transactions A, Vol. 18A(1987), p.350.

[8] A. F. Oliveira, J. M. C. Barros, K. R. Cardoso, D. N. Travessa: Materials Science and Engineering A, Vol. 379(2004), p.321.

[9] M. Angappan,V. Sampath, B. Ashok, V. P. Deepkuma: Materials and Design, Vol. 32(2011), p.4050.

[10] H. C. Fang, K. H. Chen, Z. Zhang, C. J. Zhu: Transactions of Nonferrous Metals Society of China, Vol. 18(2008), p.28.

[11] K. Y. Xiao, X. J. Zheng, J. L: Nuclear Power Engineering, Vol. 28(S1)(2007), p.87(In Chinese).

[12] C. F. Meng, H. W. Long, Y. Zheng: Metallurgical and Materials Transactions A, Vol. 28A(1997), p. (2067).

[13] J. F. Li, N. Birbilis, C. X. Li, Z. Q. Jia, B. Cai, Z. Q. Zheng: Materials Characterization, Vol. 60(2009), p.1334.

[14] J. K. Park: Materials Science and Engineering, Vol. 103(1988), p.223.

[15] M. Puiggali, A. Zielinski, J. M. Olive, E. Renauld, D. Desjardins, M. Cid: Corrosion Science, Vol. 40(1998), p.805.

DOI: 10.1016/s0010-938x(98)00002-x

[16] M. B. Kannan, V. S. Raja: Engineering Fracture Mechanics, Vol. 77(2010), p.249.

[17] F. Viana, A. M. P. Pinto, H. M. C. Santos, A. B. Lopes: Journal of Materials Processing Technology, Vol. 92/93(1999), p.54.

[18] H. C. Fang, K. H. Chen, X. Chen, H. Chao, G. S. Peng: Corrosion Science, Vol. 51(2009), p.2872.